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首页> 外文期刊>The international arab journal of information technology >Cryptanalysis of AES-128 and AES-256 Block Ciphers Using Lorenz Information Measure
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Cryptanalysis of AES-128 and AES-256 Block Ciphers Using Lorenz Information Measure

机译：使用Lorenz信息测度对AES-128和AES-256分组密码进行密码分析

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摘要

Encryption algorithms will transform a human interpretable text block or information in to a non-interpretable block of symbols. The objective of any such encryption algorithm will be making the cipher block more non-interpretable and seemingly random block of symbols. So any cipher block will always be random and will purely be a set of random permutations of symbols. The efforts of distinguishing the cipher text of a cipher from random permutation and distinguishing a cipher blocks of different algorithms are called as "distinguisher attacks". Generally, almost all the classical ciphers are distinguishable and even breakable. But the modern ciphers have been designed to withstand against several kinds of attacks and even withstand against distinguisher attack. It means, we cannot even guess the type of cipher used for encryption only by seeing/analyzing the encrypted block of symbols. In this work our focus will be only on distinguisher attack on modern ciphers. For that, we have attempted to distinguish the cipher blocks of AES-128 and AES-256 using a metric called Lorenz Information Measure (LIM) which is commonly used in image and signal classification systems. In our findings, we showed that the cipher blocks of AES-128 and AES-256 are certainly distinguishable from one another.
机译：加密算法会将人类可解释的文本块或信息转换为不可解释的符号块。任何这种加密算法的目的都是使密码块变得更不可解释，并且看起来像是随机的符号块。因此，任何密码块将始终是随机的，并且将纯粹是符号的随机排列的集合。区分密码的密文和随机置换以及区分不同算法的密码块的工作被称为“区分攻击”。通常，几乎所有经典密码都是可区分的，甚至是易破解的。但是现代密码的设计可以抵御多种攻击，甚至抵御区分攻击。这意味着，仅通过查看/分析已加密的符号块，我们甚至无法猜测用于加密的密码类型。在这项工作中，我们的重点将仅在于对现代密码的区分攻击。为此，我们尝试使用一种称为Lorenz Information Measure（LIM）的度量来区分AES-128和AES-256的密码块，该度量通常在图像和信号分类系统中使用。在我们的发现中，我们表明AES-128和AES-256的密码块肯定是可以区分的。

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